Absorption Spectra

In the Bohr model, what determines the color of light emitted?

• The speed of the electron

• The energy difference between levels

• The size of the atom

• The number of protons

Which element's spectrum was first explained by the Bohr model?

• Helium

• Hydrogen

• Lithium

• Oxygen

How does the Bohr model account for the absorption of light?

• Electrons move to a lower energy level

• Electrons move to a higher energy level

• Electrons remain in the same energy level

• Electrons change their charge

Tags

NGSS.HS-PS4-3

What is the relationship between frequency and energy in the Bohr model?

• Higher frequency means lower energy

• Higher frequency means higher energy

• Frequency and energy are unrelated

• Frequency is always constant

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NGSS.HS-PS4-1

Upon closer examination, sunlight (and all stars) actually emit ___ spectra.

• bright-line (or emission)

• absorption (or dark-line)

• continuous

• multiple

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

The analysis of the way matter emits and absorbs radiation is called ___.

• astronomy

• chemistry

• spectroscopy

• atomic theory

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NGSS.HS-PS4-3

Each element on the periodic table can be identified by its

• classification as a solid, liquid or gas.

• location on the table.

• ability to react to form compounds.

• unique spectral "fingerprint."

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NGSS.HS-PS1-1

What is an absorption spectrum?

• A graph showing the wavelengths of light absorbed by a substance

• A graph showing the wavelengths of light emitted by a substance

• A graph showing the wavelengths of light reflected by a substance

• A graph showing the wavelengths of light transmitted through a substance

Tags

NGSS.HS-PS4-4

Which of the following best describes the appearance of an absorption spectrum?

• Continuous spectrum with dark lines

• Bright lines on a dark background

• Uniform color with no lines

• Randomly scattered bright and dark spots

Tags

NGSS.HS-PS4-3

In an absorption spectrum, what causes the dark lines to appear?

• Absorption of specific wavelengths by electrons

• Emission of specific wavelengths by electrons

• Reflection of specific wavelengths by electrons

• Scattering of specific wavelengths by electrons